Positioning clamp for machining precision castings and using method
A technology of positioning fixtures and precision casting, which is applied in the direction of manufacturing tools, positioning devices, metal processing equipment, etc., can solve the problems of low processing efficiency, troublesome work, difficulty in finding the reference plane of the chassis, and difficulty in ensuring the consistency of precision casting dimensions, etc.
Active Publication Date: 2017-05-31
TIANJIN 712 COMM & BROADCASTING CO LTD
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Problems solved by technology
[0002] Considering the processing cost of a certain type of case in our company, it is changed from machining to precision casting. It is difficult to guarantee the dimensional consistency of precision casting. During the processing, each fur case must be designed with a different processing plan. Due to the large change in casting size, Therefore, it is very difficult to find the reference plane of the chassis. In many cases, each chassis is required to perform tool setting, size finding, and modification while processing, and the craftsmen and operators always pay attention to the processing status of each chassis. Such processing Very inefficient and laborious
Method used
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Embodiment Construction
[0021] Such as figure 1 , 2 , 3, a positioning fixture for precision casting processing, including positioning fixture body 1, chisel 2.
[0022] The positioning clip body 1 is in the shape of a rectangular plate. Several rectangular through holes 1-1 for weight reduction are arranged in the concave surface of the reverse side of the positioning clip body 1. The several rectangular through holes 1-1 are symmetrically arranged in four rows, and each row has four rectangular holes. Through holes 1-1, four rectangular through holes 1-1 are arranged equidistantly, above the first and second rectangular through holes 1-1 in the first row and the first and second rectangular through holes 1-1 in the fourth row The bottom of the rectangular through hole 1-1 is respectively provided with a raised positioning block 1-2, in the first and second rectangular through holes 1-1 of the second row and the first and second of the third row Between the rectangular through holes 1-1, there are...
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The invention relates to a positioning clamp for machining precision castings and a using method. The positioning clamp comprises the following steps: correspondingly inserting 12 projections on four projected positioning blocks of a positioning clamp body into 12 positioning grooves in a surface B of a case body of a case; attaching the bottom surface of the positioning clamp body to the surface B of the case body of the case; clamping the case on a horizontal milling machine and machining a surface A and a surface C of the case; then placing the case on a vertical milling machine and machining a surface D; before machining the surface B, successively placing a chiseling knife in a rectangular hand hole I, a rectangular hand hole II and two rectangular hand holes III of the positioning clamp body; beating a chiseling handle by using a hammer to reserve scratching marks on the left wall, the middle wall and the right wall of the case; then disassembling the positioning clamp body; respectively comparing the left wall, the middle wall and the right wall of the case with a left reference side wall, a middle reference side wall and a right reference side wall; and analyzing skewing of a machining reference of the surface B. A technologist can design a machining scheme by observing positions of the marks, errors after machining of the case are controlled in a reasonable range, and the machining efficiency is improved.
Description
technical field [0001] The invention relates to a special-purpose machining positioning fixture, in particular to a positioning fixture for precision casting processing and a use method thereof, which are used for positioning of precision casting cabinets before finishing. Background technique [0002] Considering the processing cost of a certain type of case in our company, it is changed from machining to precision casting. It is difficult to guarantee the dimensional consistency of precision casting. During the processing, each fur case must be designed with a different processing plan. Due to the large change in casting size, Therefore, it is very difficult to find the reference plane of the chassis. In many cases, each chassis is required to perform tool setting, size finding, and modification while processing, and the craftsmen and operators always pay attention to the processing status of each chassis. Such processing The efficiency is very low and laborious. Content...
Claims
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IPC IPC(8): B23Q3/06B23C3/00
CPCB23C3/00B23Q3/06
Inventor 刘欣李寿刚刘景晔武传波杨晓红周然
Owner TIANJIN 712 COMM & BROADCASTING CO LTD